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3 years ago

Can someone help me find the surface area

Mathematics

2 answers:

Firdavs [7]3 years ago

7 0

To start, find the area of the triangles. The formula for the area is B times H divided by 2. To find the base, add 1.5 plus 1.5. The answer to that is 3, so the base is 3. The height is 2.6, so now you need to multiply 3 by 2.6. The answer to that is 7.8, so the last step to find the area is 7.8 divided by two. The answer to that is 3.9, but there is also another triangle on the back of the triangular prism, so 3.9 times 2 is 7.8. Yes, I know you could just easily just do 7.8 as the answer to both areas, but whatever, we already did that. The second to last step of finding the surface area is finding the area of the rectangle faces. The formula for that is L times W, so the length is 5 and the width is 3. Multiplying those together gives us the answer of 15, and since there are two rectangles, the final area of both rectangles is 30. The last step is to add 7.8 to 30, giving us the final surface area of 37.8!

Lilit [14]3 years ago

6 0

The surface area will be 37.8

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mckenna and lara work for their uncle eddie, who repairs skateboards and bicycles. uncle eddie is leaving for a vacation to the

juin [17]

The correct answer is:

15 bicycles and 6 skateboards.

Explanation:

Let x represent the number of bicycles and y represent the number of skateboards. The first equation in our system is then

x+y = 21, since there are 21 total items in the shop.

Each bicycle has 2 tires and each skateboard has 4; this gives us the equation

2x+4y=54 (because they are ordering 54 tires).

This makes our system

$\left \{ {{x+y=21} \atop {2x+4y=54}} \right.$

We will use elimination to solve this; we first need one of the variables to have the same coefficient in both equations. We will make x the same, and we will do this by multiplying the first equation by 2:

$\left \{ {{2(x+y=21)} \atop {2x+4y=54}} \right. \\
\\\left \{ {{2x+2y=42} \atop {2x+4y=54}} \right.$

Now we will subtract the second equation from the first one:

$\left \{ {{2x+2y=42} \atop {-(2x+4y=54)}} \right. \\
\\-2y=-12$

Divide both sides by -2:

-2y/-2 = -12/-2

y = 6

There were 6 skateboards. Substituting this into the first equation,

x+6 = 21

Subtract 6 from each side:

x+6-6 = 21-6

x = 15

There were 15 bicycles.

3 0

3 years ago

In a group of 20 there are 7 boys what is the ratio of girls to boys?

marysya [2.9K]

Step-by-step explanation:

given,

total members in grp = 20

no. of boys = 7

no. of girls = 20 - 7 = 13

so,

the ratio of girls to boys is = 13:7

hope this answer helps you dear...take care and may u have a great day ahead!

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3 years ago

A model of a famous statue is 1 and one fourth inches tall. The actual statue is 6 and two thirds feet tall. What is the ratio o

Studentka2010 [4]

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3 years ago

Show each step to solve the equation below: 4x+5=x+2

Eduardwww [97]

$4x + 5 = x + 2$
Subtract 2 from both sides.

Your equation will be: 4x+3=x
Subtract 4x from both sides.
Yoir equation will be: 3= -3x
Divide by -3x on both sides.

Your final answer: x=-1

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4 years ago

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3 years ago